faeeel



UNITE STAT S ATENT Fries.

JOHN FARREL, OF NEIV YORK, N. Y.

METALLIC ALLOY FOR SAFES.

SPECIFICATION forming part of Letters Patent No. 298,365, dated May 13,1884-.

Application filed November 2, 1883. (Specimens) To ctZZ whom it mayconcern Be it known that I, JOHN FARREL, of New York city, New York,have invented a Metallic Alloy for Safes, whereof the following is aspecification.

The metal made from franklinite ore is one of the hardest metals known,and, being well adapted for resisting the action of drills and othercutting-tools, is extensively used bymyself and others in theconstruction of burglarproof safes. It is, however, more or less porousand friable from the peculiarity of its crystalline structure, and thisfriability is a weakness, inducing the metal to pulverize under thedrill when applied with great pressure. My newalloy is not thussusceptible, and yet is as hard as or harder than franklinite and metalsof the same character. It is made by melting up tin-scrapsuch as thewaste or scraps from tinware-manufactureand combining the same with softwrought-iron, combined with the franklinite iron, or that made from thespathic ores. It may be variously rnade; but I have practiced thefollowing way with success: I take the tin-plate scraps, melt them down,and run the metal into molds for castings of a convenient form forremelting. I then take about an equal quantity, by weight, of thiscompound and of a franklinite iron, put both in a cupola, and'fuse themtogether at a very high heat. I then draw off this molten metal and pourit into molds prepared and adapted for bringing out the article orarticles desired. Another way is to compress the scrap-tin into bundlesand melt it up with the franklinite at once. The metal or alloy socompounded when cold is harder, tougher,

burglar-proof safes, and because its hardness I is natural and cannot beaffected by the local application of heat. The alloy may also be usedfor journal-boxes, for dies for stamping,

and rolls for rolling sheet metals, andfor other purposes. All articlesmade from this metal or alloy should be cast at once to the size and N vshape required, if possible; and if not, the finishing must be bygrinding the surfaceas by corundum-wheels-because it is nearlyimpossible to work the metal with cutting-tools.

My said invention is restricted to the ingredients herein specified.Nevertheless, I do not confine myself to the exact proportionsindicated, but shall vary the same when found necessary; and instead ofthe franklinite the similar metal known as spiegeleisen may besubstituted with good effect; but the franklinite is preferable.

I claim as my invention 1. The new composite metal or alloy of tinplatescrap, iron, and franklinite iron or its equivalent, substantially asdescribed.

2. The method of formingacomposite metal of tin-plate scrap, iron, andfranklinite iron 01' its equivalent, substantially as described,consisting in melting the ordinary tin-scrap to form an alloy, andfusing this alloy at the same time or subsequently with the franklinite:

JOHN FARBEL.

Witnesses:

EARLE H. SMITH, W. D. VAN Bonn.

